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Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution
Long, Jinxing; Xu, Ying; Wang, Tiejun; Shu, Riyang; Zhang, Qi; Zhang, Xiaohong; Fu, Juan; Ma, Longlong
2014-11-01
Source PublicationBIORESOURCES
Volume9Issue:4Pages:7162-7175
AbstractThe structural evolution of Panicum virgatum lignin during hydrothermal depolymerization was investigated. Product distribution from various temperatures was studied using gas chromatography-mass spectrometry (GC-MS) and gel permeation chromatography (GPC) analysis. The physical-chemical properties of initial lignin, tetrahydrofuran soluble fraction, and char were also comparatively characterized by elemental analysis, scanning electron microscopy (SEM), thermogravimetry (TG), and Fourier transform infrared (FT-IR) spectroscopy. Results showed that both the depolymerization and repolymerization were significantly temperature-dependent. The undesired char formation becomes obvious when the temperature is greater than 180 degrees C. Further investigation demonstrated that H lignin is the most accessible for hydrothermal depolymerization, whereas S lignin is the most recalcitrant. Moreover, under the thermal effect and the dissolution of the subcritical water, the basic structure of lignin was first collapsed and then further decomposed into low-molecular weight products by the fracture of ether bonds, accompanied by char formation after repolymerization and dehydration.
SubtypeArticle
KeywordLignin Depolymerization Repolymerization Structural Evolution
WOS HeadingsScience & Technology ; Technology
WOS Subject ExtendedMaterials Science
WOS KeywordIONIC LIQUID PAIRS ; CATALYTIC DEPOLYMERIZATION ; SUGARCANE BAGASSE ; KRAFT LIGNIN ; HOT-WATER ; CONVERSION ; CHEMICALS ; CELLULOSE ; BIOMASS ; DELIGNIFICATION
Indexed BySCI
Language英语
WOS SubjectMaterials Science, Paper & Wood
WOS IDWOS:000345396900110
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10656
Collection中国科学院广州能源研究所
AffiliationChinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
Recommended Citation
GB/T 7714
Long, Jinxing,Xu, Ying,Wang, Tiejun,et al. Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution[J]. BIORESOURCES,2014,9(4):7162-7175.
APA Long, Jinxing.,Xu, Ying.,Wang, Tiejun.,Shu, Riyang.,Zhang, Qi.,...&Ma, Longlong.(2014).Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution.BIORESOURCES,9(4),7162-7175.
MLA Long, Jinxing,et al."Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution".BIORESOURCES 9.4(2014):7162-7175.
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